Radiator for automobiles



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May l5, 1923.

S. W. RUSHMORE RADIATOR FOR AUTOMOBILES Filed Sent. 13 1921 i". u .Mrreiterated; may liti,

BADIATB FOP, LUTOMBILES. Y

Application filed September l, 1h21. Serial Ito. 500,@22.

T 0 all `to 'wim/m t may; concern:

Be 1t lrnown that l, 'SAMUEL W. RUSH moan, a citizen of the UnitedStates, and' resident of Plainield, in the'county of Union and StateoiNew Jersey, have in vented certain new and useful improve- 'ments inRadiators for J{lutomobiles, of

'lli

which the following is a specification.4

My present invention is shown as embodied in an air cooled radiatorsuitable for use in connection with thecOoling systems of' internalcombustion engines used on auto* mobiles, trucks, flying' machines, etc.Cer-- tain 'features of the invention are useful when the radiator isemployed in the usual Way't/o cool down-derving water, discharged intothe top and removed from the bottom thereof, lout they are especiallyuseful. when the .radiator is utilized as an uptlow steam condenseroperated in accordance with method described in my hatent l,378,724,granted May litlnlQQl. lt will be evident, however, that variousfeatures ot the inventionmay be employed for other purposes and in otherrelations. i L

l ln the standard types ot radiatorsI now used en automobiles andtrucks, either operated by the downdiow `watercooling method or thetip-flow steam-condensing method,

the central part ot the radiator is much more eti'ective for cooling'than the side portions because the fan tor drawing the air through thehoneycomb. is relatively ineffective for creatinfr'draft through theside portions of the honeycomb. 1.

:in viewiof the above7 my inif'entioncoin templates making verticaltloiv paths at the sides ot the honeycomb longer thanA the paths at thecenter, thereby exposing the We ter to the action oi a much greatercooling' area at the sides.,

Another Way is to mali 'the flow resistance at 'the sides greater than-at the center. This may be accomplished either by making the passagesat the sides of smaller flow section, or, as in the preferred embodimentot' my inyention, increase or" length ofthe side paths will giveincreased flow-resistance combined with increased distance ot tlow. lnthe preferred form, aigzaggnng the paths at the sides to malte themlonger, also'increases the :dow resistance.

it Awill he evident that my above described invention is ofv vastlyincreased importance Where the honey-comb is peaked in at. the

top, tiene vertical height ot the honeycomb much less at the sides thanat the center. i

The above .and other features of my invention may be more fully-understood in the following description in connection with theaccompanying drawings, in Which:-

' Fig. l is a diagrammatic viewjindicating vthe relations ofthe up anddown .tlowpassages at the center and the sides;

Fig. 2 1s a section on the line 2 2, Fig. i 4 'Y 7 1. y

ll 1g. 3 is an enlarged sectional VleW show-` ing the construction ofEthe honeycomb which is diagrammatically indicated-n Fig. l; and

Fig. 4 is a similarly enlarged face View Pot a honeycomb element asViewed from the right in Fig.

lo these drawings, the radiator casing comprises a peripheral casing l,front. and rear walls 3, in which the honeycombl isv soldered to form awater tight container. lhe central portion of the honeycomb at 4 is ofgreater height than the side portions 5 and their constructions aredi'erent.

The central portion l is shown as comi prising a plurality of stripsbent so as to torni vertical Wall 5 Withtransverse fins 6. A similarstrip with similarly spaced Afins is assembled in the manner shown inFig. 3 so 'that its vertical Walls 5*l and bent fins 6 in conjunctionwith Walls 5 and tins 6 on thel other strip. form a vertically alignedseries oi through air passages 7. Aj-is indicated in Fig. 4, the strips5, 5, have ont-bent marginal bearing surfaces4 S, 8, which space apartthe surfaces o", to form the /vertical flow paths for the Water or steamto be cooled. There are also co-operatimgY fore-and-aft rib portions 9,9, arranged to interlock and maintain vertical registry.

These elements assembled as shown in Fig. 3 have the edges A dipped inmolten tin or solder to hold the parts together and make the verticalpassage tight.

The side portions of the honeycomb are formed by pairs of reversely bentstrips 10,

il, nested as shown to Jform the zigzag pas- ]2. These pairs ofstripsare held in spaced relation by marginal bent portions similar `to theportions 8, 8, described in connection with the central part of thehoneycomb structure. .A plurality of the assembled strips 1l, i0, areassociated as shown in the drawings s0 that .the outwardly proiectingsurfaces or strips 10 form the third side for the in-bent-portion of anad1 jacent strip-11 and vice versa. l Obviously the flow path betweeneach pair of strips 1,0, 11,'is'twicelas long as the' strai ht flow pathbetween 5 and'. Thus the ow resistance at the'sides, other thin sv beingequal", 4Will betwice asv great as for t e central portion, and the timetaken for liow of the fluid medium through a given yertical distance atthe sideswill be twice as longas at the center. Obviously, the flowsections of verticall passages 5, 5a, need not be the sameas thosebetween l0 and 11,nor is it jnec'eary'that the air passages formed byvthe strips 10,11, be of the same Width and height as the Width andheightof the'air passages 5', 5% Hence bysuitable variation the lengths andresistances of the'up-and-down flow .paths at the sides may be made tobear any desired relations to the lengths and resistances of the centralpaths. ln this Way itis possible to design the side areas with referenceto the center areas so that the cooling at the sides will beapproximately the same las at the center when water is used as-a coolingmedium. (lr, when the device is used as a steam condenser, the height ofhoneycomb which will come into operation as actual condensing surface,will be the saine for the sides as iory the center.

However, such exact equalizations are by no means necessary/.for thepractice of my invention.- Very great improvementis ob tained merely bymaking the iiow passages for the sides ot' greater length or ol' greatervflow resist-ance than 'For the center area.

ture; nor is it always necessary to combine The above describedprinciple. of increasing the flow resistance, or the length of the itwo' types of structure to get the desired result. For instance, bothfeatures can becoinbined in the through-tube type of honey,- coin'b,such, tor instance, as 1s shown 1n my application, Serial Number500,381, filed September 1.3, 1921. Byl using larger tubes v at thesides, or setting t erncloser together, or giving a polygonecross-section to body portions of the tubes, the flow path length andthe How-resistance of the air passages and the interspaces can be variedwithin quite wide limits. 1

An 'upper'inle't 13 may be employed for down-How water cooling; or alower inlet y 14 for the up-iow steam-con`densing method,

the outlet 15 being usable i'n either case.

I claim:

l. An air cooled radiator having low re*` sistance flow paths for thecooling-.duid

over the central portions of the area of the honeycomb and higherindividual How resistance for each of the paths at the side portions ofsaid area. Y

2. An air cooled radiator having the flow paths for the cooling mediumlonger at the sides than .for the central portions area thereof.

3. An air cooled radiator having a honey` being designed for greaterflow resistance per unit ot' vertical height than are the flow paths forthecentral portion.

5. An air cooling radiator of the type in which the vertical height otlthe honeycomb is substantially less at the sides than at the centralportion. the fiow passages at the sides being designed to have iiowpaths at the sides ot' length Lequal to or greater than thefflow pathsfor the central portion.

` Signed at Plainield in the county of Union and State oiNewyJerseythi's 10th dayot September A. D. '1921.

SAMUEL w, aUsHMoira.y

